[classicman]

I'm with monster. It automatically renews ... sometimes even when you cancel.

I switched jobs starting in Nov of last year and got a plan through the exchange for the last two months of 2015. I canceled it on 12/31/15 as another plan was much cheapre (relatively speaking) with a different carrier.
So I canceled the one and started the other which I've been paying for. I got a letter about 2 weeks ago that my plan with company A which I canceled, will terminate on 4/30 and oh by the way, you owe us $1800+ in back premiums.
We are still discussing the definition of "terminated"